Which of the Following Is NOT a Reason to See

Which of the following is NOT a reason to see inequality in income between individual X and individual Y?

A) X was born into a wealthy family,while Y was not.
B) X has a disability making it difficult to work,while Y does not.
C) X goes to university in the East,while Y goes to university in the West.
D) X is black,while Y is white.
E) X's father owns a multi-million dollar company,while Y's father is a janitor.